Commercial vehicle front air suspension

Abstract

The utility model relates to a kind of commercial vehicle front air suspension, belong to automobile parts technical field, including air bag, pedestal and support, first movable connecting piece is arranged between air bag and pedestal, pedestal is movably connected with air bag by first movable connecting piece, second movable connecting piece is arranged between air bag and support, support is movably connected with air bag by second movable connecting piece, air bag is connected with car beam by support, air bag is connected with axle by pedestal, air bag is connected with pedestal and support by first movable assembly and second movable assembly, avoid the rigid connection of existing air bag, the damage caused to air bag, so that air bag only bears vertical pressure, prolong the service life of air bag.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to a front air suspension for commercial vehicles. Background Technology

[0002] Traditional commercial vehicles use leaf springs for their front suspension, which offer relatively low comfort. In particular, with customers demanding higher levels of driving experience and comfort, the inherent technical characteristics of leaf spring suspensions present new challenges.

[0003] To address the shortcomings of traditional leaf springs, most existing commercial vehicles employ air suspension. For example, Chinese utility model patent CN219115178U describes a front air suspension assembly for a commercial vehicle, comprising an air spring assembly, a composite stabilizer bar assembly, a direct thrust bar assembly, a lateral thrust bar assembly, and a shock absorber assembly. The air spring assembly includes two airbags and two brackets for corresponding mounting of the two airbags. Each of the two brackets is bent upwards on the side facing the composite stabilizer bar assembly, forming two inclined bends. The composite stabilizer bar assembly includes a composite stabilizer bar and two connecting rods. The two ends are respectively rotatably connected to one end of the two connecting rods, and the other ends of the two connecting rods are respectively rotatably connected to the lower ends of the two inclined bends; the straight thrust rod assembly includes two straight thrust rods, one end of the two straight thrust rods is respectively rotatably connected to the upper ends of the two inclined bends, and the other ends of the two straight thrust rods are rotatably mounted on both ends of the crossbeam at the front of the frame; the transverse thrust rod assembly includes a transverse thrust rod, one end of the transverse thrust rod is rotatably mounted on the other side of a bracket, and the other end of the transverse thrust rod is rotatably connected to a first mounting bracket, which is mounted on one side longitudinal beam at the front of the frame.

[0004] Existing commercial vehicles utilize airbags instead of leaf springs. The excellent energy absorption and vibration damping characteristics of airbags can convert the kinetic energy of severe vibrations experienced by the axle into heat energy, thus significantly reducing the vibration force transmitted from the axle to the chassis. The upper part of the airbag is rigidly connected to the longitudinal beams and axle via a first connector and bracket. When the vehicle turns, tilts, or travels on uneven surfaces, relative tilting and torsional motion occurs between the chassis and the axle. Because the airbag is rigidly connected, it will twist or be subjected to lateral tensile / compressive forces. These lateral forces can cause localized excessive stretching or compression of the airbag wall, leading to wear at the airbag seal and cracking of the rubber layer. Prolonged stress can cause airbag leakage, and the internal cord reinforcement layer (load-bearing core) of the airbag may prematurely fatigue and fracture due to lateral shear forces, ultimately causing the airbag to rupture. To address the problems in existing technologies, we propose a front air suspension for commercial vehicles. Utility Model Content

[0005] This utility model addresses the problems in the prior art by providing a front air suspension for commercial vehicles, achieved through the following technical solution: A front air suspension for a commercial vehicle includes an airbag, a support, and a bracket. A first movable connector is provided between the airbag and the support, and the support is movably connected to the airbag through the first movable connector. A second movable connector is provided between the airbag and the bracket, and the bracket is movably connected to the airbag through the second movable connector.

[0006] The present invention is further configured such that: the first movable connecting member includes a first connecting cylinder and a first connecting rod; the first connecting cylinder is fixedly connected to the lower end face of the airbag; a first through hole is provided on the lower end face of the first connecting cylinder; the first connecting rod includes a first rod body and a second rod body arranged coaxially; the first rod body and the second rod body are fixedly connected; the end of the second rod body away from the first rod body is fixedly connected to a support; the first rod body is disposed in the inner cavity of the first connecting cylinder; the diameter of the first rod body is larger than the diameter of the first through hole; the diameter of the first through hole is larger than the diameter of the second rod body; and the height of the first connecting cylinder is greater than the height of the first rod body.

[0007] The present invention is further configured such that: the second movable connecting member includes a second connecting cylinder and a second connecting rod; the second connecting cylinder is fixedly connected to the upper end face of the airbag; a second through hole is provided on the upper end face of the second connecting cylinder; the second connecting rod includes a third rod body and a fourth rod body arranged coaxially; the third rod body and the fourth rod body are fixedly connected; the third rod body is disposed in the inner cavity of the second connecting cylinder; the end of the fourth rod body away from the third rod body is fixedly connected to the bracket; the diameter of the third rod body is larger than the diameter of the second through hole; the diameter of the second through hole is larger than the diameter of the fourth rod body; and the height of the second connecting cylinder is greater than the height of the third rod body.

[0008] The present invention is further configured such that the ends of the first rod and the third rod near the airbag are both arc-shaped.

[0009] In summary, the beneficial technical effects of this utility model are as follows: The airbag is connected to the vehicle beam via a bracket, and to the axle via a support. The airbag is also connected to the support and bracket via a first movable component and a second movable component. This avoids the rigid connection of existing airbags, which can cause damage to the airbag. The airbag only bears vertical pressure, thus extending its service life. Attached Figure Description

[0010] Figure 1 This is an isometric drawing used to illustrate the overall structure of this embodiment; Figure 2 This is a top view used to show the overall structure of this embodiment; Figure 3 It is along Figure 2 Sectional view of section line AA in the middle; Figure 4 yes Figure 3 A magnified view of part B in the middle section; Figure 5 yes Figure 3 A magnified view of part C in the middle.

[0011] Reference numerals: 1. Airbag; 2. Support; 3. Bracket; 4. First movable connector; 41. First connecting cylinder; 42. First connecting rod; 43. First through hole; 44. First rod body; 45. Second rod body; 5. Second movable connector; 51. Second connecting cylinder; 52. Second connecting rod; 53. Second through hole; 54. Third rod body; 55. Fourth rod body. Detailed Implementation

[0012] The present invention will be further described in detail below with reference to the accompanying drawings. Example

[0013] like Figure 1-5 As shown, this utility model discloses a front air suspension for commercial vehicles, including an airbag 1, a support 2, and a bracket 3. A first movable connector 4 is provided between the airbag 1 and the support 2, and the support 2 is movably connected to the airbag 1 through the first movable connector 4. A second movable connector 5 is provided between the airbag 1 and the bracket 3, and the bracket 3 is movably connected to the airbag 1 through the second movable connector 5. The airbag 1 is connected to the vehicle beam through the bracket 3, and the airbag 1 is connected to the axle through the support 2. The airbag 1 is connected to the support 2 and the bracket 3 through the first and second movable components, avoiding the damage caused to the airbag 1 by the rigid connection of the existing airbag 1, so that the airbag 1 only bears vertical pressure and extends the service life of the airbag 1.

[0014] The first movable connector 4 includes a first connecting cylinder 41 and a first connecting rod 42. The first connecting cylinder 41 is fixedly connected to the lower end face of the airbag 1. A first through hole 43 is opened on the lower end face of the first connecting cylinder 41. The first connecting rod 42 includes a first rod body 44 and a second rod body 45 coaxially arranged. The first rod body 44 and the second rod body 45 are fixedly connected. The end of the second rod body 45 away from the first rod body 44 is fixedly connected to the support 2. The first rod body 44 is disposed in the inner cavity of the first connecting cylinder 41. The diameter of the first rod body 44 is larger than the diameter of the first through hole 43. The diameter of the first through hole 43 is larger than the diameter of the second rod body 45. The height of the first connecting cylinder 41 is greater than the height of the first rod body 44. The second movable connector 5 includes a second connecting cylinder 51 and a second connecting rod 52. The second connecting cylinder 51 is fixedly connected to the upper end face of the airbag 1. A second through hole 53 is provided on the upper end face of the second connecting cylinder 51. The second connecting rod 52 includes a third rod body 54 and a fourth rod body 55 coaxially arranged. The third rod body 54 and the fourth rod body 55 are fixedly connected. The third rod body 54 is disposed in the inner cavity of the second connecting cylinder 51. The end of the fourth rod body 55 away from the third rod body 54 is fixedly connected to the bracket 3. The diameter of the third rod body 54 is larger than the diameter of the second through hole 53, and the diameter of the second through hole 53 is larger than the diameter of the fourth rod body 55. The height of the second connecting cylinder 51 is greater than the height of the third rod body 54. The ends of the first rod body 44 and the third rod body 54 near the airbag 1 are both arc-shaped. Since airbag 1 is connected to support 2 (axle) and bracket 3 (frame) respectively via first movable connector 4 and second movable connector 5, when relative torsional movement occurs between the axle and frame, first connecting rod 42 will rotate relative to first connecting cylinder 41 or second connecting rod 52 will rotate relative to second connecting cylinder 51, thereby preventing airbag 1 from twisting. When relative tilt occurs between the axle and frame, since the ends of first rod 44 and third rod 54 near airbag 1 are both arc-shaped, first rod 44 will swing relative to first connecting cylinder 41 and second rod 45 will swing within a certain range relative to second connecting cylinder 51, thereby preventing airbag 1 from bearing lateral tension or pressure, ensuring that airbag 1 only bears vertical pressure, and extending the service life of airbag 1.

Claims

1. A front air suspension for a commercial vehicle, comprising an airbag (1), a support (2), and a bracket (3), characterized in that, A first movable connector (4) is provided between the airbag (1) and the support (2), and the support (2) is movably connected to the airbag (1) through the first movable connector (4). A second movable connector (5) is provided between the airbag (1) and the bracket (3), and the bracket (3) is movably connected to the airbag (1) through the second movable connector (5).

2. The commercial vehicle front air suspension according to claim 1, characterized in that, The first movable connector (4) includes a first connecting cylinder (41) and a first connecting rod (42). The first connecting cylinder (41) is fixedly connected to the lower end face of the airbag (1). A first through hole (43) is opened on the lower end face of the first connecting cylinder (41). The first connecting rod (42) includes a first rod body (44) and a second rod body (45) arranged coaxially. The first rod body (44) and the second rod body (45) are fixedly connected. The end of the second rod body (45) away from the first rod body (44) is fixedly connected to the support (2). The first rod body (44) is disposed in the inner cavity of the first connecting cylinder (41). The diameter of the first rod body (44) is greater than the diameter of the first through hole (43). The diameter of the first through hole (43) is greater than the diameter of the second rod body (45). The height of the first connecting cylinder (41) is greater than the height of the first rod body (44).

3. A commercial vehicle front air suspension according to claim 2, characterized in that, The second movable connector (5) includes a second connecting cylinder (51) and a second connecting rod (52). The second connecting cylinder (51) is fixedly connected to the upper end face of the airbag (1). The upper end face of the second connecting cylinder (51) is provided with a second through hole (53). The second connecting rod (52) includes a third rod body (54) and a fourth rod body (55) arranged coaxially. The third rod body (54) and the fourth rod body (55) are fixedly connected. The third rod body (54) is disposed in the inner cavity of the second connecting cylinder (51). The end of the fourth rod body (55) away from the third rod body (54) is fixedly connected to the bracket (3). The diameter of the third rod body (54) is greater than the diameter of the second through hole (53). The diameter of the second through hole (53) is greater than the diameter of the fourth rod body (55). The height of the second connecting cylinder (51) is greater than the height of the third rod body (54).

4. A commercial vehicle front air suspension according to claim 3, characterized in that, The first rod (44) and the third rod (54) are both arc-shaped at the end near the airbag (1).

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